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UT139B True RMS Digital Multimeter
UNI-T's UT139B is a True RMS auto range digital multimeter with 4000 display count and 1kHz bandwidth, featuring VFC, NCV, Max/Min/Rel measurements.
Main features
1. MAX/MIN/REL modes
2. Data hold, LED backlight, auto power off
3. VFC: low pass filter
4. Full range protection (600V)
5. True RMS
6. NCV
7. Auto/manual ranges selectable
Accessories
Battery, test leads
| Specifications | Range | Best Accuracy |
| Model | MO00640057 | |
| DC Voltage (V) | 40mV/400mV/4V/40V/400V/600V | ±(0.5%+2) |
| AC Voltage (V) | 40mV/400mV/4V/40V/400V/600V | ±(0.8%+3) |
| DC Current (A) | 400μA/4000μA/40mA/400mA/4A/10A | ±(0.7%+2) |
| AC Current (A) | 400μA/4000μA/40mA/400mA/4A/10A | ±(1%+3) |
| Resistance (Ω) | 400Ω/4kΩ/40kΩ/400kΩ/4MΩ/40MΩ | ±(0.8%+2) |
| Capacitance (F) |
9.999nF/99.99nF/999.9nF/9.999μF/99.99μF /999.9μF/9.999mF/99.99mF |
±(4.0%+5) |
| Frequency (Hz) | 10Hz-10MHz | ±(0.1%+4) |
| Features | ||
| Display Count | 4000 | |
| Auto Range | √ | |
| Manual Range | √ | |
| True RMS | √ | |
| Bandwidth (Hz） | 45Hz ～1kHz | |
| V.F.C | √ | |
| Duty Cycle | 0.1% ～ 99.9% | √ |
| Diode | Around 3V | |
| NCV | √ | |
| Auto Power Off | Around 15 minutes | √ |
| Continuity Buzzer | √ | |
| Low Battery Indication | ≤2.5V | √ |
| Data Hold | √ | |
| Relative Mode | √ | |
| MAX/MIN | √ | |
| LCD Backlight | √ | |
| Input Protection | 600Vrms | √ |
| Input Impedance for DCV | 1GΩ Max | √ |
| General Characteristics | ||
| Power | AA1.5*2 | |
| LCD Size | 58mm × 36mm | |
| Product Colour | Red and grey | |
| Product Net Weight | 370g | |
| Product Size | 175mm x 81mm x 48.5mm | |
| Standard Accessories | Battery, test leads | |
| Standard Individual Packing | Gift box, English manual | |
| Standard Quantity Per Carton | 40pcs | |
| Standard Carton Measurement | 645×450×340mm (0.098CBM per standard carton) | |
| Standard Carton Cross Weight | 25.5kg | |